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Q.

When iron and sulphur are heated at high temperature

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a

they do not react

b

yellow colored FeS is formed

c

Black colored FeS is formed

d

mixture of iron and sulphur is obtained

answer is A.

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Detailed Solution

If iron (Fe) and sulphur(S) are heated at high temperature then a black color iron sulphide (FeS) is formed. Hence, it is a chemical process.

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